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Патент USA US2405714

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Aug.‘ 13, 1946.
G.F. RYAN
2,405,114
‘METHOD OF AND APPARATUS FOR PERFCRATING S‘HEET MATERIAL
Filed Sept. 2'7, 1944
3 Sheets-Sheet 1
' Inventor
George E’Eycm
Aug. 13, 1946.
I
‘
G. F. RYAN
2,405,734
METHOD OF AND APPARATUS FOR PERFORATING- SHEET MATERIAL
Filed Sept. 27, 1944 I
F492
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s Sheets-Sheet 2'
24.
924
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Hill“!
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1
George F’ Egan.
s Attorney
Aug. 13, 1946. '
G. F. RYAN
'
2,405,714
METHOD OF AND APPARATUS FOR PERFORATING SHEET MATERIAL
‘
Filed Sept. 27, 1944'
s Sheets-Sheet,3
[nu enfor
Geor‘gé FIRE/an
Patented Aug. 13, 1946
2,405,714
‘UNlTED STATES
‘TENT orric
2,405,714
METHOD or AND APPARATUSFOR PERFO
RATING SHEET MATERIAL
George
Ryan, Peabody, Mass, assignor" to
United Shoe Machinery Corporation, Fleming
t'on, N. J., a corporation of New Jersey
Application. September 27, 1944, Serial No. 555,922
11 Claims. (Cl. 164--93)
I
2
.
This invention relates to the art of perforating
sheet material and is herein illustrated in con
nection with a method of perforating shoe part
?rst cost of the apparatus is- comparatively low,
and, furthermore, the cost ofpower'for operating
the apparatus is negligible. I
These and’ other features or‘ the invention are
blanks by the use of fluid under high pressure.
In‘ perforating sheet material. for use in Various
disclosed in the accompanying specification and
industries, and particularly in the shoe manufac
turing industry in connection with the formation
in the drawings, and are pointed out in the
claims.
of shoe part blanks, use is commomy" made of dies
In the drawings,
Fig’. 1 is a view in side elevation of apparatus
illustrating one embodiment of my invention;
“Fig. 2v is a plan view of the apparatus shown in
Fig‘. 1;
provided with a plurality of punches for produc
ing the perforations in the material. It fre 10
quently happens that, as in the case of shoe tips
or vamps, a large number of perforations are'em
3 is a cross section taken along’ line III-III
played for ornamental purposes. This results in
of Fig. 1;
Q
.
the necessity for using‘ a correspondingly large
number of punches, which must be accurately 15 ’ Fig. 4 is a plan view of a completed blank pro
duced by the apparatus; and
shaped and located in the dies in order to produce
Fig‘. 5 is a diagram of the electrical connections
satisfactory blanks,- with the result that the cost
of the dies themselves is high,
for the apparatus.
‘
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The apparatus‘ is used for'ope‘rating' upon shoe
It is an object of the present invention to pro
vide a method cfperforating sheet material so 20 part blanks, such as a tip [0‘ illustrated in‘Fig. 4,
to produce an ornamental design comprising‘ a
that a Considerable portion of the expense here
plurality of perforations l2,
_
tofore resultingr from the use of dies will be elimi.
The method employed for producing perfora
nated. To this end and as illustrated, in its
tions in the blank brie?y‘ consists in positioning
method aspect the invention consists in subject
ing a blank of sheet material to the action of a 25 the blank between two perforated plates l4 and
?uid under high pressure, or high velocity‘, or
, I6, and subjecting the blank to the action of a
?uid under pressure in an explosion chamber '18.
both, to ‘rupture portions of the blank at prede
The explosion chamber l8 comprises a hollow
termined‘ points, thereby to perforate the blank.
Preferably, the ?uid isdi-récted against the blank
in a plurality of jets formed by placing a perfo
rated plate in juxtaposition to the‘ blank to be
operated upon. This method renders unneces
sary the use of expensive dies having accurately
machined and positioned punches.
casting having an outlet port 20, adjacent to
Con
nected to the chamber is’ an explosive ?uid supply
30 which thevplates' M and 15 are located.
' line 22,, and within the chamber is located a spark
plug 2djfor exploding the mixture at the proper
time. The plate [4 is arranged tobe secured to
In another aspect, the invention provides ap 35 the upper outer surface of the chamber l8 by
bolts 26’, the central portion 28 of the plate being
paratus for carrying out the method referred to.
comparativeh'r thin and being positioned in aline
As illustrated, the apparatus‘ comprises a plurality
ment with the outlet port 20. The central portion
of plates between which the blank to be operated
of the plate is provided with perforations 30 cor
upon is clamped, the plates having perforations in
alinenient with each other, and an explosion 40 responding to the perforated design, which it is
desired to produce in the blank Ill The plate
chamber, the outlet of which is in communica
It, which forms" a backing plate, is provided with
tion with the perforations in one of the plates,
perforations 32 corresponding in shape and size to
together with means for supplying an explosive
perforations 3-0- in the plate It. Preferably, the
mixture to the chamber‘ and for exploding the
mixture, with thé result that the" products of com 45 erforations in the two plates are readily pro
duced by clamping ‘the plates together and drill
bustion passing through the perforations in the
ing holes through both- plates in one operation.
plates will rupture the‘ blank forming the desired
The plates are arranged to be interchangeable
perforations therein. Preferably and as shown,
with other plates having differently arranged per
the perforations in the‘ plates are‘ located to form
forations, so that a wide‘ variety of perforatedde
an ornamental design corresponding to a per
signs may be produced in blanks. The plate I I6 is
forated design to be produced in a blank‘. The
secured by bolts 34 to a bolster plate 36, which,
perforations in the plates ‘can readily be formed
by a drilling operation, which is'inexpensive' com
pared to the formation of punch tubes, heretofore
used in perforating dies‘.
in turn, is secured by the same bolts to a cover
plate 38 mounted upon a pivot 39 carried by a
For this reason the 55 boss 42 on the top of the chamber l8. This ar
2,405,714
3
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rangement is such that the backing plate Hi can
of the treadle, the switch 1-6 is opened, with the
be removed to permit insertion of a blank it,
while at the same time permitting return of the
result that the residual current in the coil causes
plate I 6 into juxtaposition to the plate l4 to clamp
the blank therebetween with the openings in the
two plates in alinement with each other, The
backing plate [6 is arranged to be clamped down
upon the blank by a toggle bolt 40, arranged to
enter a slot 41 on the cover plate 38, and wing
nut 42. The purpose of this is to prevent sepa-p
rationof the plates at such time as an explosion
and effects an explosion of the mixture.
The mixture under high pressure and high
a spark across the terminals of the spark plug
velocitypasses through the perforations in the
plate 14, ruptures the material of the blank to
form perforations therein, and passes out through
the perforations in the backing plate It. Suc
tion through the waste pipe 46 withdraws the
waste gases, fresh air being admitted through the
ball valve 50.
takes place in the chamber 18.
'
"
'
'It is to be noted that, because of the high
In orderto provide for the removal of waste
velocity and pressure of the gases passing through
gases from the chamber 18, the bolster plate 36
is provided with an expansion chamber‘ 44..t0 15 the material of the blank, the openings formed
correspond closely in cross section to the open
which is connected a‘ ?exible pipe 46, which is
preferably connected to a suction pump (not '
shown). The chamber I8 is provided with an
inlet port 48, Fig, 1, upon the inner end of which
is seated a ball valve 50, the arrangement being 20
such that during an explosion in the chamber
the ball valve will be closed but that, thereafter,
vwhen the chamber is connected to the pipe 46,
the valve will open to permit scavenging of the
gases in the chamber and to permit the in?ow
of air.
Any suitable explosive mixture may be used,
7 such as a, mixture of gasoline and air, acetylene
gas, or other ?uid. The mixture is introduced
through the supply line at 22, which is con
trolled by a valve 52. This valve is operated by a
foot treadle 54 pivoted at 56 .on the casting and
operating through a loose link 58 a gear segment
60, which is in mesh with a second gear segment .
62 for rotating the valve. The treadle is nor
rmallyrmaintained in raised position by a spring
64, which tends to move the segment 60 in a
clockwise direction into engagement with a stop
66. Upward movement of the treadle under ac
tionof the spring 64 is cushioned by a spring
pressed plunger 68 carried by a boss 10 on the
side of the chamber 18.
The electrical circuit for effecting ignition of
explosive ?uid by the spark plug comprises an.
inductance coil 12, a safety switch 14, a treadle
operated switch 16, and a source of current 18.‘
suitably connected in a circuit by leads 84, 86, 88.
90 and 92. The wiring diagram including these
elements is shown in Fig. 5. The purpose of the
safety switch 14 is to prevent ignition in the event
that the cover plate 38 is not in its lowermost.
position with the backing plate It located in
alinement with the outlet port 20. To this end,
the plate 38 is provided with a depending lug 9.’:
carrying a set screw 96 for operating a button
ings in the plate.
Furthermore, the ragged edges,
which are commonly found in blanks perforated
by punch tubes, particularly when such tubes
are dull, are eliminated bythe use of the present
device.
.
Having described my invention, what I claim as
new and desire to secure by Letters Patent of
the United States is:
1. The method of perforating sheet material
‘which consists in clamping the material between
two plates having alined perforations, and sub
jecting the material to the action of a ?uid pass
ing through the plates and the material at high
velocity.
.
'
2. The method of perforating sheet material
which consists in clamping the material between
two plates having alined openings, and exposing
one of the plates to the action of a ?uid moving
at high velocity.
3. The method of perforating sheet material
which consists in clamping the material between
two perforated plates, the perforations of which
are in alinement, and subjecting the assembly to
the action of a, ?uid moving at sufficiently high
velocity to pass through the perforations, thereby
disrupting the material adjacent to the perfora
tions.
4. The method of perforating sheet material
which consists in clamping the material between
two plates having alined openings, locating the
assembly in juxtaposition to an opening in a
chamber containing ?uid under pressure su?i
ciently high to cause ?uid to ‘disrupt the sheet
material adjacent to the perforations.
_
5. The method of perforating sheet material
which consists in clamping the material between
two perforated plates in juxtaposition to the
mouth of an explosion chamber, supplying \an
explosive ?uid mixture to the chamber, and
detonating the mixture, thereby applying pres
98 controlling the switch 14. The arrangement is
sure to the material adjacent to the perforations
such that the circuit through the switch 14 is
sufficiently great to rupture the material.
open until such time as the push button 98 is
forced inwardly by reason of the fact that the
6. The method of ornamenting shoe part
cover plate 38 is in its lowermost position. The
blanks which consists in clamping a blank be
circuit through the 'treadle-operated switch 16
tween two perforated plates in which the per
is open when the treadle 54 is in raised position
forations are in alinement with each other, plac
with a'set screw I00 thereon forcing a push but
ing the assembly in an opening in a ?uid pres
ton H12 of the switch inwardly. Downward move
sure chamber, and raising the pressure in the
ment of the lever releases the button and closes (35 chamber sufficiently to cause the ?uid to disrupt
the circuit through the switch. Thus, when the
the material of the blank adjacent to the perfora
cover plate 38 is in its lowermost position and the
tions..
treadle 54 is depressed, the valve 52 will be opened
7. A perforating machine comprising a pres
to permit flow of explosive ?uid into the cham
sure chamber having an opening therein, a per
ber 18. Downward movement of the treadle ef 70 forated plate located within the opening, means
fects closing of the circuit through the switch
for securing a blank to be operated upon in close
16, with the result that the coil 12 is energized.
relation to the plate, and means for supplying
?uid under pressure to the chamber for disrupt
When the treadle is released, the spring 64. causes
ing the blank adjacent to the perforations in
valve 52 and, at the end of the upward movement 75 the plate.
it to move ‘upwardly, re?ecting a, closing» of the -»
2,405,714
6
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gether, a supply line for supplying an explosive
mixture to the chamber, means for igniting the
8. A perforating machine comprising a pres
sure chamber having an opening therein, a per
mixture including a spark plug, a ?uid control
forated plate located in juxtaposition to the
opening, means for clamping upon the plate a
blank to be operated upon, means for supplying
valve, manually operated means for controlling
the valve, and means for initiating an operation
an explosive mixture to the chamber, and means
of the spark plug subsequently to operation of
for exploding the mixture, thereby to disrupt the
blank adjacent to the perforations in the plate.
the valve in admitting ?uid to the chamber.
11. A perforating machine comprising a pres
9. A perforating machine comprising a pres
sure chamber having an opening therein, a per
sure chamber having an opening therein, a plate
located adjacent to the opening and having per
forations therein, an arm pivotally mounted upon
forated plate located in the opening, a cover piv
the chamber, a second plate carried by the arm
otally mounted upon the chamber, a second per
and movable into juxtaposition to the ?rst-men
forated plate carried by the cover and movable
tioned plate, said second-mentioned plate having
into alinement with the ?rst-mentioned plate,
means for securing the two plates in ?xed posi 15 perforations in alinement with the ?rst-men
tioned plate when the two plates are close to
tion with a blank to be operated upon positioned
gether, a supply line for supplying an explosive
between them, and means for directing ?uid mov
mixture to the chamber, means for igniting the
ing at high velocity from the chamber through
mixture including a spark plug, a ?uid control
the plates, thereby to perforate the blank.
valve, manually operated means for controlling
10. A perforating machine comprising a pres
the valve, means for initiating an operation of
sure chamber having an opening therein, a plate
the spark plug subsequently to operation of the
located adjacent to the opening and having per
valve in admitting ?uid to the chamber, and elec
forations therein, an arm pivotally mounted upon
trical connections between the manually operable
the chamber, a second plate carried by the arm
means and the spark plug for preventing opera
and movable into juxtaposition to the ?rst-men
tion of the spark plug when the arm is in raised
tioned plate, said second-mentioned plate having
position.
perforations in alinement with the ?rst-men
GEORGE F. RYAN.
tioned plate when the two plates are close to
10
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